Trim symbology label decimal places when using Arcade in ArcGIS Pro?

Question

I have an issue trying to symbolise a layer with graduated symbols using a custom expression:

1. I am limited to using arcade/there are no other languages in the drop down which I don't believe should be the case.
2. An arcade custom expression, even $feature['FieldName'], is producing correct values/band but the corresponding labels have 6 decimal places appended where using the field alone (no custom expression) is not. No casting and/or round, trim or replace etc will fix this.

I am using ArcGIS Pro 2.0.1.

I can manually edit the labels but any changes I make to symbology will bring back the decimal places.

Answer 1

In your symbology pane, click the hamburger icon in the top-right corner and select Advanced

In the advanced symbology settings pane uncheck "Pad with zeros", and then click the back arrow.

Your labels should now be without all the extra decimal places.

The default number of decimal places appears to be 6. If you do still want to see some decimals, but less than 6, go back into the Advanced settings, set your Rounding > Decimal places to another number, e.g. 2, and leave Pad with zeros checked, your labels should now be padded with only 2 decimal places.

Answer 2

The accepted answer is still correct, but the location of the advanced options for symbology has changed slightly. It is no longer in the symbology options menu, but is now a tab icon.

Answer 3

The 'Advanced' menu isn't available for Labels. Here's an expression that can be used for them using Round():

Round($feature.fc_field_name, 3)

Round(value, numPlaces?) -> returns: Number

Source: https://developers.arcgis.com/arcade/function-reference/math_functions/